Class T Fuse Blocks
300 and 600 Volt
SPECIFICATIONS
Voltage Ratings:
300 Volts AC
600 Volts AC
Ampere Ratings:
0 – 600 amperes
Approvals:
UL Listed (File No. E14721)
CSA Certified (File No. LR73091)
RECOMMENDED FUSES
JLLN (300V) and JLLS (600V) series fuses
300 and 600 volt fuse blocks are designed for use with
miniaturized Class T fuses. Class T fuses are very fast-acting,
current limiting, and approximately one-third the size of
electrically-comparable Class RK1 fuses.
FEATURES/BENEFITS
Bases are molded phenolic. To provide a low resistance
connection and long-range reliability, steel reinforcing
springs are supplied as standard. Larger blocks employ an
integral heat sink for maximum heat dissipation.
Class T 300V
Amp No. of
Rating Poles
30
2
3
2
3
4
1
2
3
1
1
1
Catalog
Number
LT30030-2
LT30030-3
LT30060-2
LT30060-3
LT30060-4
LT30100-1
LT30100-2
LT30100-3
LT30200-1
LT30400-1
LT30600-1
Connector Type
(Add suffix shown)
Screw
Box Lug
Class T 600V
Maximum
Wire Size
S = #10 CU
C = #2 CU
C = #2 CU-AL
60
#2/0 CU-AL
100
250 MCM CU-AL
(2) 250 MCM CU-AL
(2) 500 MCM CU-AL
200
400
600
Amp No. of
Rating Poles
1
2
3
1
2
3
1
2
3
1
1
1
Catalog
Number
LT60030-1
LT60030-2
LT60030-3
LT60060-1
LT60060-2
LT60060-3
LT60100-1
LT60100-2
LT60100-3
LT60200-1
LT60400-1
LT60600-1
Connector Type
(Add suffix shown)
Screw
Box Lug
Maximum
Wire Size
S = #10 CU
C = #2 CU-AL
60
100
200
400
600
CR
CR
CR
CR
CR
C
C
C
C
C
C
30
SR
SR
SR
Note: Reinforcing springs standard on all 300 volt Class T
fuse blocks up to 100 amperes. 300 volt Class T blocks 200
amperes and larger have stud mountings.
CR
CR
CR
CR
CR
CR
C
C
C
C
C
C
C = #2 CU-AL
#2/0 CU-AL
250 MCM CU-AL
(2) 250 MCM CU-AL
(2) 500 MCM CU-AL
Note: Reinforcing springs standard on all 600 volt Class T
fuse blocks up to 60 amperes. 600 volt Class T blocks 100
amperes and larger have stud mountings.
LT30030
1.19
[30.2]
1.19"
[30.2]
1.13"
[28.6]
.218" [5.54] THRU
.39" [9.91] C'BORE
x .44" [9.91] DP.
2.88
[73.0]
2.88"
[73.0]
2.25
[57.2]
2.25"
[57.2]
1.13
.31
[7.9]
[28.6]
1.13"
.31"
[7.9]
[28.6]
.62"
[15.9]
2.38
[60.3]
3.50"
[88.9]
1.12"
[28.5]
2 POLE
3 POLE
118
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